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US 4,304,259 AGranted
Plant circuit having change-over means for changing sequence of flow
AssigneeSulzer Brothers Limited
InventorAlfred Brunner
Life of this patent
Estimating the term…
Abstract
The change-over means employs two three-way valves and two non-return valves for affecting a switch over in the sequence of flow through the four flow elements. Each three-way valve is constructed with a closure member which may only close one of the inlets of a pair of inlets of the valve or one of the outlets of a pair of outlets of the valve. The valves are arranged so as to switch the flow from a sequence of A-B-C-D to a sequence of A-C-B-D.
Claims3
A plant circuit comprising
- at least four flow elements for conveying a fluid flow therethrough;
- change-over means for changing the sequence of flow through said elements, said means including
- a first three-way valve having an inlet connected to an outlet of a first one of said flow elements, a first outlet selectively connected to an inlet of a second one of said flow elements and a second outlet selectively connected to an inlet of a third one of said flow elements, said three-way valve having means for simultaneously opening one of said outlets while closing the other of said outlets;
- a second three-way valve having a first inlet selectively connected to an outlet of said third flow element, a second inlet selectively connected to an outlet of said second flow element and an outlet connected to an inlet of a fourth one of said flow elements, said second three-way valve having means for simultaneously opening one of said inlets while closing the other of said inlets;
- a first non-return valve connected to and between said outlet of said third element and said inlet of said second element to permit a flow only from said outlet of said third element to said inlet of said second element;
- and
- a second non-return valve connected to and between said outlet of said second flow element and said inlet of said third flow element to permit a flow only from said outlet of said second element to said inlet of said third element.
4 more elements
Dependencies are inferred from the claim text.